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| n | a(n) |
|---|---|
| 1 | 398 |
| 2 | 2262 |
| 3 | 12276 |
| 4 | 68906 |
| 5 | 391672 |
| 6 | 2259386 |
| 7 | 12874198 |
| 8 | 73197080 |
| 9 | 418190364 |
| 10 | 2392155730 |
| 11 | 13641003160 |
| 12 | 77798447248 |
| 13 | 444313934342 |
| 14 | 2536940776320 |
| 15 | 14475829142936 |
| 16 | 82619028156938 |
| 17 | 471664099792988 |
| 18 | 2692274158653134 |
[398,2262,12276,68906,391672,2259386,12874198, 73197080,418190364,2392155730,13641003160, 77798447248,444313934342,2536940776320, 14475829142936,82619028156938,471664099792988, 2692274158653134] |